Ferrer took ages to close an injured, limping Almagro. He does have a strategy, it's called grinding the opponent out until you get an error or he fails to return your rallyball. He even pushes his backhand with his left hand halfway up the throat of the racquet.

Novak might try to do something for the highlight reel or on match point if and when he has a high enough lead in a set or in the match.

It's just their style, I'm not knocking it's effectiveness. It works, but is uninteresting apart from the odd rally unless they play someone with a markedly different style who can deal with their game i.e. Tsonga, DelPotro, Davydenko, Federer, Raonic, Nishikori, etc...

But don't you see how he does it? Crosscourt, crosscourt, up the line, up the middle, crosscourt, drop shot, wait and volley?